IUCN Red List Status: Endangered (EN)
Rotala ritchiei Koehne (Unresolved), Bot. Jahrb. Syst. 4: 386 1883. (Syn: Ammannia ritchiei C.B.Clarke);
Kas Week : AK19072009: Observed at a lake, off Kas-Bamnoli road. Is it some Rotala species??
… yes to species of Rotala (family Lythraceae).
How about Rotala rotundifolia?
If this is a submerged aquatic herb then this would be Rotala ritchiei, a rare plant. It is difficult to catch this in flowers but they are small, pink and axillary. Good, a rare plant came on.